03-03-2008 08:53 AM - edited 03-05-2019 09:30 PM
We have a client on a 3524 switch that needs to join a multicast group. The 3524 is connected to a port on a 6509 port which is a L3 port. The 6509 does have PIM and ip sparse-mode configured on the port that the 3524 is connected to, but the 3524 doesn not do IGMP - it is CGMP only and the client is not able to join the MC group.
Is this a case where configuring the command 'ip cgmp proxy' on the 6509 port connected to the 3524 will help?
If not, how do I get the client on the 3524 to join a MC group through the 6509?
03-03-2008 09:48 AM
Can you configure L2<->L2 between the 6509 and the 3524 instead of L3<->L2 ?
Extending the Vlan down to the 3524 should provide connectivity to the MCast groups.
Can the workstation ping the MCast groups ?
HTH,
__
Edison.
03-03-2008 09:57 AM
Is that just a matter of changing the 6509 port to a switch port, and creating an L3 interface vlan and assigning that to the port?
Here is the current config - the 3524 is actually connected to two 6509s for redundancy so there is a glpb portion of the config:
interface GigabitEthernet2/2
description SW3524-mngmt F0/23
ip address xxx.xx.43.2 255.255.255.128
ip pim sparse-mode
mls qos trust dscp
glbp 1 ip xxx.xx.43.1
glbp 1 priority 110
glbp 1 preempt
Would I change it to this to make it a L2 interface?
interface GigabitEthernet2/2
description SW3524-mngmt F0/23
switchport
switchport mode access
switchport access vlan 10
int vlan 10
ip address xxx.xx.43.2 255.255.255.128
ip pim sparse-mode
mls qos trust dscp
glbp 1 ip xxx.xx.43.1
glbp 1 priority 110
glbp 1 preempt
Change all ports of the 3524 to vlan 10.
The workstation can ping the server that is sending out the MC stream, but I didn't try to see if if could ping the MC group address.
03-03-2008 10:46 AM
Is that just a matter of changing the 6509 port to a switch port, and creating an L3 interface vlan and assigning that to the port?
Yes
The workstation can ping the server that is sending out the MC stream, but I didn't try to see if if could ping the MC group address.
Give that a try. If the workstation is able to ping the MCast group, then we may look into an application issue.
HTH,
__
Edison.
03-03-2008 10:51 AM
I'll work that side of it. So you don't think this is a CGMP/IGMP issue?
03-03-2008 10:59 AM
CGMP and IGMP is for controlling MCast traffic in a switched environment so it doesn't flood every switchport. It should not prevent from a client joining a group.
You can have a hub a MCast environment and they don't run IGMP nor CGMP. MCast traffic is treated as broadcast on those conditions.
03-03-2008 11:01 AM
You're are right! I wasn't thinking clearly.
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